Bluetooth earbud



FIG. 1 is a front perspective view of a Bluetooth earbud showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left-side view thereof, the right-side view being a mirror image; and,

FIG. 5 is a rear view thereof. 

The ornamental design for a Bluetooth earbud, as shown and described. 